Frank Bogart Bridges Sr. (July 4, 1890 – June 10, 1970) was an American football, basketball, and baseball coach. He served as the head football coach at Baylor University from 1920 to 1925, Simmons University—now known as Hardin–Simmons University—from 1927 to 1929, and St. Mary's University in San Antonio, Texas from 1935 to 1939. Bridges was also the head basketball coach at Baylor from 1920 to 1926, at Simmons from 1927 to 1929, and at St. Mary's from 1935 to 1939, tallying a career college basketball mark of 102–137. In addition, he was Baylor's head baseball coach from 1920 to 1927, amassing a record of 95–73, and the head baseball coach at St. Mary's in 1938. 1944, Bridges served as the co-head coach with Pete Cawthon and Ed Kubale for the Brooklyn Tigers of the National Football League (NFL). He graduated from Harvard University.^[1]

Bridges coached high school football in Fort Smith, Arkansas.^[1] During his tenure as head football coach at Baylor University, Bridges compiled a 35–18–6 record. His winning percentage of .644 ranks third in school history, behind R. H. Hamilton (.786) and Bob Woodruff (.645). In 1921 and 1922, he led the Bears to consecutive eight-win seasons. Bridges won the school's first two Southwest Conference championships, in 1922 and 1924. Baylor did not win another until 1974. From 1927 to 1929, he coached at Hardin–Simmons University where he posted a 16–13–4 record.

Bridges died on June 10, 1970, at a nursing home in San Antonio.^[2][3]